https://scholars.lib.ntu.edu.tw/handle/123456789/381614
Title: | Plasmonic ZnO/Ag Embedded Structures as Collecting Layers for Photogenerating Electrons in Solar Hydrogen Generation Photoelectrodes | Authors: | RU-SHI LIU DING-WEI HUANG HAO MING CHEN |
Keywords: | Ag; femtosecond-laser direct-write; hydrogen generation; plasmonics; silver oxide; ZnO | Issue Date: | Feb-2013 | Journal Volume: | 9 | Journal Issue: | 17 | Start page/Pages: | 2926-2936 | Source: | Small | Abstract: | A new fabrication strategy in which Ag plasmonics are embedded in the interface between ZnO nanorods and a conducting substrate is experimentally demonstrated using a femtosecond-laser (fs-laser)-induced plasmonic ZnO/Ag photoelectrodes. This fs-laser fabrication technique can be applied to generate patternable plasmonic nanostructures for improving their effectiveness in hydrogen generation. Plasmonic ZnO/Ag nanostructure photoelectrodes show an increase in the photocurrent of a ZnO nanorod photoelectrodes by higher than 85% at 0.5 V. Both localized surface plasmon resonance in metal nanoparticles and plasmon polaritons propagating at the metal/semiconductor interface are available for improving the capture of sunlight and collecting charge carriers. Furthermore, in-situ X-ray absorption spectroscopy is performed to monitor the plasmonic-generating electromagnetic field upon the interface between ZnO/Ag nanostructures. This can reveal induced vacancies on the conduction band of ZnO, which allow effective separation of charge carriers and improves the efficiency of hydrogen generation. Plasmon-induced effects enhance the photoresponse simultaneously, by improving optical absorbance and facilitating the separation of charge carriers. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
URI: | http://scholars.lib.ntu.edu.tw/handle/123456789/381614 | DOI: | 10.1002/smll.201202547 | SDG/Keyword: | Direct write; Hydrogen generations; In-situ X-ray absorption spectroscopy; Localized surface plasmon resonance; Plasmonic nanostructures; Plasmonics; Solar-hydrogen generation; ZnO; Charge carriers; Electromagnetic fields; Hydrogen production; Interfaces (materials); Nanorods; Silver; Silver oxides; Surface plasmon resonance; X ray absorption spectroscopy; Zinc oxide; Plasmons; hydrogen; nanomaterial; silver; zinc oxide; hydrogen; nanomaterial; silver; silver oxide; zinc oxide; chemistry; electrode; light; photochemistry; procedures; article; chemistry; femtosecond-laser direct-write; hydrogen generation; methodology; photochemistry; plasmonics; ZnO; Electrodes; Hydrogen; Light; Nanostructures; Photochemistry; Silver; Zinc Oxide; Ag; femtosecond-laser direct-write; hydrogen generation; plasmonics; silver oxide; ZnO; Electrodes; Hydrogen; Light; Nanostructures; Photochemistry; Silver; Zinc Oxide |
Appears in Collections: | 光電工程學研究所 |
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